xf86: Accept devices with the 'simpledrm' driver.
Without this patch from master, Xorg fails with simpledrm and nomodeset on Fedora 36: https://bugzilla.redhat.com/show_bug.cgi?id=2067151
SimpleDRM 'devices' are a fallback device, and do not have a busid so they are getting skipped. This will allow simpledrm to work with the modesetting driver
(cherry picked from commit b9218fad) Signed-off-by: Jocelyn Falempe jfalempe@redhat.com